| abstract |
Disclosed is a method of imparting resistance of paper to penetration by liquids comprising incorporating in the paper a size composition comprising one or more alkenyl succinic anhydride sizing agents prepared from the reaction of maleic anhydride and one or more substantially symmetrical C20-C28 internal olefins (such as 10-eicosene, 11-docosene, 12-tetracosene, 13-hexacosene, 14-octacosene, 9-eicosene, 10-heneicosene, 10-docosene, 11-tetracosene, 11-tricosene, 12-hexacosene, 12-pentacosene, 13-octacosene, 13-heptacosene), or a mixture thereof. |